Codeforce~ 第77页

Codeforces Round 89 (Rated for Div. 2)

A.ShovelsandSwords题解：假设第一种工具买了x个,第二种买了y个。那么由题可知0≤2x+y≤a{0≤2x+y≤a}0≤2x+y≤a0≤x+2y≤b{0≤x+2y≤b}0≤x+2y≤b求(x+y)max，高中线性规划可以求解。intmain(){intt;cin>>t;while(t--){lla,b;cin>>a>>b;if(2*min(a,b)>t;while(t--){lln,

张小生的先生·2020-08-25 05:15

Educational Codeforces Round 92 (Rated for Div. 2)解题报告

EducationalCodeforcesRound92(RatedforDiv.2)A.LCMProblem题目大意给定区间[l,r][l,r][l,r]，让你找到正整数xxx，yyy满足l≤xry>

CUG_YZL·2020-08-25 05:15

Codeforces Round #624 (Div. 3) A—C

A-AddOddorSubtractEven（奇偶）将x变成y两种操作1，x可以加一个任意的奇数2，x可以减一个任意的偶数判断x与y的奇偶，以及他的大小关系即可代码：#include#include#include#include#include#include#include#include#include#includetypedeflonglongll;#definePllmake_pair

_Alexander·2020-08-25 05:41

Codeforces Round #641 (Div. 1)

A-OracandLCM先对每一个数字进行质因数分解，记录，该质因数的次方和出现次数。如果出现了n-1次，那么答案有该质因数最小次方。如果出现了n次，那么答案拥有该质因数次小次方。#include#include#include#include#include#include#include#include#include#include#include#include//#include#inc

weixin_44019404·2020-08-25 05:10

Codeforces Round #587 (Div. 3) C. White Sheet

题目http://codeforces.com/contest/1216/problem/C题意给你三个矩形的左下角坐标和右上角坐标。第一个矩形为白矩形，第二第三个为黑矩形。

皓洲·2020-08-25 05:05

CodeForces - 266A——Stones on the Table

StonesontheTableTherearenstonesonthetableinarow,eachofthemcanbered,greenorblue.Counttheminimumnumberofstonestotakefromthetablesothatanytwoneighboringstoneshaddifferentcolors.Stonesinarowareconsideredn

螢塚·2020-08-25 05:33

CodeForces - 492A（第三期白银组比赛T2）

Timelimit1000msMemorylimit262144kBVanyagotncubes.Hedecidedtobuildapyramidfromthem.Vanyawantstobuildthepyramidasfollows:thetoplevelofthepyramidmustconsistof1cube,thesecondlevelmustconsistof1 + 2 = 3cub

糖贩·2020-08-25 05:33

Codeforces Round #624 (Div. 3) A - Add Odd or Subtract Even

AddOddorSubtractEventimelimitpertest2secondsmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputYouaregiventwopositiveintegersaaandbb.Inonemove,youcanchangeaainthefollowingway:Choosean

菱形继承·2020-08-25 05:26

Codeforces Round #491 (Div. 2)题解

A.Ifatfirstyoudon’tsucceed…timelimitpertest1secondmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputEachstudenteagerlyawaitsthedayhewouldpasstheexamssuccessfully.Thus,Vasyawasreadyto

ssqsssq·2020-08-25 05:54

Frog Jumping

https://codeforces.com/contest/1077/problem/Atimelimitpertest1secondmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputAfrogiscurrentlyatthepoint0onacoordinateaxisOx.Itjumpsbythefollo

STZG·2020-08-25 05:10

Codeforces Round #587 (Div. 3)E2. Numerical Sequence (hard version)（二分）

题目：E2.NumericalSequence(hardversion)题意：一串数11212312341234512345612345671234567812345678912345678910……有q(qusingnamespacestd;typedeflonglongll;inlinellget_sum(llx){//从1~区间长度x的前x项和returnx*(x+1)/2;}inlinel

Mr.路痴·2020-08-25 05:37

Educational Codeforces Round 61 (Rated for Div. 2) F题解

FYouaregivenastringssoflengthnnconsistingoflowercaseLatinletters.Youmayapplysomeoperationstothisstring:inoneoperationyoucandeletesomecontiguoussubstringofthisstring,ifalllettersinthesubstringyoudelete

weixin_42754967·2020-08-25 05:05

【Codeforces】1216B - Shooting

ProblemDescription：RecentlyVasyadecidedtoimprovehispistolshootingskills.Todayhiscoachofferedhimthefollowingexercise.Heplacedncansinarowonatable.Cansarenumberedfromlefttorightfrom1ton.Vasyahastoknockdo

喜欢ctrl的cxk·2020-08-25 05:31

非降路径和Lindström–Gessel–Viennot定理（例题牛客网暑期ACM多校训练营（第一场）A.Monotonic Matrix）（codeforces 348D HDU 5852）

参考博客and图片来源https://blog.csdn.net/ftx456789/article/details/81132126非降路径就是给定一个起点（0,0）和终点（m,n），然后只能向右或者向上走。非降路径问题转换为组合数可以认为总共有n+m种选择，从中选出m步向右走，或者选择n步向上走，则可得路径的方案数为或。Lindström–Gessel–Viennot定理详见维基百科：http

Bug_Programmer·2020-08-25 05:54

Educational Codeforces Round 47 B Minimum Ternary String[字符串]

B.MinimumTernaryStringtimelimitpertest:1secondmemorylimitpertest:256megabytesinput:standardinputoutput:standardoutputYouaregivenaternarystring(itisastringwhichconsistsonlyofcharacters'0','1'and'2').Yo

Whowell·2020-08-25 05:35

codeforces679 D. Bear and Chase

codeforces679D.BearandChasehttp://blog.csdn.net/Ezereal/article/details/52743686DBearandChaseO(n^3)暴力首先

weixin_34341229·2020-08-25 05:40

Codeforces 321A

x[i]表示：从第一步到第i步为止，横坐标的位置；y[i]表示：从第一步到第i步为止，纵坐标的位置；设字符串S的长度为len;则有k*x[len]+x[i]=a;而且k*y[len]+y[i]=b;（这里下标从1开始），而且要注意的是k为非负整数，还要考虑x[len]或y[len]为0的情况。然后从1到len枚举i就可以了。附上代码：1#byStomach_ache2defmove(s,i):3i

weixin_34021089·2020-08-25 05:47

如何获取codeforces的完整数据？（玄学方法）

做cf题总是wa，wa了以后还没发看完整数据，好气哦！怎么办？这其实非常简单首先看一下wa的那个数据有什么特点比如说n=1111,m=1111那么就if(n==1111&&m==1111)getdata();getdata()是什么，其实就是把数据按行输出出来的程序因为cf的输入数据只能显示一部分，但是输出数据我们可以自我调整把输入数据进行分块处理，然后按行输出cf显示输出数据是可以显示20行的，

weixin_33800463·2020-08-25 05:01

CF492E Vanya and Field

题目描述：http://codeforces.com/problemset/problem/492/E（英文题）翻译不写了大家都能看懂。看到这道题的第一想法是啥……？暴力模拟？

weixin_30918415·2020-08-25 05:53

Codeforces Round #477 (rated, Div. 2, based on VK Cup 2018 Round 3) C. Stairs and Elevators【二分查找】...

Intheyearof30XX30XXparticipantsofsomeworldprogrammingchampionshipliveinasinglelargehotel.Thehotelhasnnfloors.Eachfloorhasmmsectionswithasinglecorridorconnectingallofthem.Thesectionsareenumeratedfrom11

yuxiaoyu.·2020-08-25 05:21

Codeforces Round #465 (Div. 2) Fifa and Fafa

C.FifaandFafatimelimitpertest1secondmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputFifaandFafaaresharingaflat.Fifalovesvideogamesandwantstodownloadanewsoccergame.Unfortunately,Faf

weixin_30737433·2020-08-25 05:44

Codeforces题目

A-WatermelonCrawlinginprocess...CrawlingfailedTimeLimit:1000MSMemoryLimit:65536KB64bitIOFormat:%I64d&%I64uSubmitStatusDescriptionOnehotsummerdayPeteandhisfriendBillydecidedtobuyawatermelon.Theychoseth

weixin_30725315·2020-08-25 05:12

Codeforces Round #277.5 (Div. 2)

题目链接：http://codeforces.com/contest/489A：SwapSortInthisproblemyourgoalistosortanarrayconsistingofnintegersinatmostnswaps.Forthegivenarrayfindthesequenceofswapsthatmakesthearraysortedinthenon-descending

weixin_30517001·2020-08-25 05:02

CodeForces - 321E Ciel and Gondolas

DiscriptionFoxCielisintheAmusementPark.AndnowsheisinaqueueinfrontoftheFerriswheel.Therearenpeople(orfoxesmoreprecisely)inthequeue:weusefirstpeopletoreferoneattheheadofthequeue,andn-thpeopletoreferthel

weixin_30488313·2020-08-25 05:30

CodeForces 492A Vanya and Cubes

A.VanyaandCubestimelimitpertest1secondmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputVanyagotncubes.Hedecidedtobuildapyramidfromthem.Vanyawantstobuildthepyramidasfollows:thetoplev

weixin_30480583·2020-08-25 05:59

网络流（费用流）CodeForces 321B：Ciel and Duel

FoxCielisplayingacardgamewithherfriendJiro.Jirohasncards,eachonehastwoattributes:position(AttackorDefense)andstrength.FoxCielhasmcards,eachonehasthesetwoattributestoo.It'sknownthatpositionofallCiel'sc

weixin_30466039·2020-08-25 05:58

Codeforces Round #277.5 (Div. 2) A,B,C,D,E,F题解

转载请注明出处：http://www.cnblogs.com/fraud/——byfraudA.SwapSorttimelimitpertest1secondmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputInthisproblemyourgoalistosortanarrayconsistingofninte

weixin_30293135·2020-08-25 04:49

Codeforces Gym100952 D. Time to go back-杨辉三角处理组合数 (2015 HIAST Collegiate Programming Contest)...

D.Timetogobacktimelimitpertest1secondmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputYouhavebeenoutofSyriaforalongtime,andyourecentlydecidedtocomeback.YourememberthatyouhaveMfriend

weixin_30263277·2020-08-25 04:17

如何获取codeforces的完整数据

推荐：如何获取codeforces的完整数据？

weixin_30240349·2020-08-25 04:46

codeforces round477

codeforcesround477好久没打cf了，回来打一场，pp了4个题的fst了三个，掉了100多分。好像cf已经三连掉从接近2000掉到1700+了。老年选手打什么cf嘛。

wcy_1122·2020-08-25 04:45

CodeForces 158B taxi

AfterthelessonsngroupsofschoolchildrenwentoutsideanddecidedtovisitPolycarpustocelebratehisbirthday.Weknowthatthei-thgroupconsistsofsifriends(1 ≤ si ≤ 4),andtheywanttogotoPolycarpustogether.Theydecided

ELL_COOL_A·2020-08-25 04:08

Codeforces 158B：Taxi

B.Taxitimelimitpertest3secondsmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputAfterthelessonsngroupsofschoolchildrenwentoutsideanddecidedtovisitPolycarpustocelebratehisbirthday.Wek

_执念_·2020-08-25 04:07

Anya and Ghosts - CodeForces 508 C 水题

AnyaandGhoststimelimitpertest2secondsmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputAnyalovestowatchhorrormovies.Inthebesttraditionsofhorror,shewillbevisitedbymghoststonight.Anyah

提比-我有特殊的AC技巧·2020-08-25 04:24

Codeforces Round #280 (Div. 2) A B C

http://codeforces.com/contest/492A水题A.VanyaandCubestimelimitpertest1secondmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputVanyagotncubes.Hedecidedtobuildapyramidfromthem.Vanyawants

mfcheer·2020-08-25 04:50

Codeforces Round #280 (Div. 2)A B C

A-VanyaandCubes:#include#include#includeusingnamespacestd;typedef__int64ll;constintN=10005;lla[N];intmain(){a[0]=0;for(lli=1;in)ans--;printf("%d\n",ans);}return0;}B-VanyaandLanterns:#include#include#i

zxxxxzzz·2020-08-25 04:48

Codeforces 258B. Little Elephant and Elections【数位DP，DFS】

B.LittleElephantandElectionstimelimitpertest2secondsmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputTherehaverecentlybeenelectionsinthezoo.Overalltherewere7mainpoliticalparties:one

朽弈·2020-08-25 04:16

Codeforces 140E New Year Garland (dp + 容斥)

#include#include#include#include#include#include#include#include#includeusingnamespacestd;#defineinf0x3f3f3f3f#defineN5020#defineM1000020#defineLLlonglong#definemod1000000007#definels(i>1)#definelsonl

yamiedie_·2020-08-25 04:44

Codeforces Round #243 (Div. 2) A,B,C(暴力枚举)

A.SerejaandMugs思路:大水杯的水是累计的..定定要改掉自己读题猴急的毛病!!CODE:#include#include#include#includeusingnamespacestd;intmain(){intn,m;while(~scanf("%d%d",&n,&m)){inta[105],s=0;for(inti=0;i#includeusingnamespacestd;int

HonniLin·2020-08-25 04:13

Codeforces Round #369 (Div. 2) B. Chris and Magic Square

B.ChrisandMagicSquaretimelimitpertest2secondsmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputZStheCoderandChristheBaboonarrivedattheentranceofUdayland.Thereisan × nmagicgridontheen

神探特斯拉·2020-08-25 04:13

Codeforces Round #222 (Div. 2)---A. Playing with Dice

PlayingwithDicetimelimitpertest1secondmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputTwoplayersareplayingagame.Firsteachofthemwritesanintegerfrom1to6,andthenadiceisthrown.Theplaye

sxk_sxy·2020-08-25 04:12

Codeforces Round #280 (Div. 2)---A. Vanya and Cubes （规律 + 暴力）

VanyaandCubestimelimitpertest1secondmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputVanyagotncubes.Hedecidedtobuildapyramidfromthem.Vanyawantstobuildthepyramidasfollows:thetoplevel

sxk_sxy·2020-08-25 04:12

【codeforces】Codeforces Round #280 (Div. 2) 水题专场

传送门：【codeforces】CodeforcesRound#280(Div.2)492A.VanyaandCubes找到最大的i使得1+2+3+……+i小于等于n，并且输出i。

poursoul·2020-08-25 04:11

CodeForce Round #484 B - Bus of Characters(思维+栈)

题目链接题目大意：公交车有n排座位，每排的座位有两个，且这两个座位的宽度一样。任何两排座位的宽度度都不一样。首先给你一个n，接下来给你n个数字代表第i排座位的宽度。然后给你一个01字符串代表乘客上车的顺序。0和1分别代表内向的人和外向的人。内向的人会从没有人坐的那几排选出一个宽度最小的那排座。外向的人会从有一个人坐的那几排选出宽度最大的那排座。题目要求你根据上车的顺序输出他们应该坐第几排。解题思路

糖宋元明清·2020-08-25 04:11

Codeforces Round #280 (Div. 2)A. Vanya and Cubes（简单计算）

题目链接题意：搭积木，告诉你第i层需要i*(i+1)/2个,然后给你总数n个，问你可以搭几层题解：直接计算#defineCF#ifndefCF#include#include#include#include#include#include#include#include#else#include#endif//CFusingnamespacestd;#defineLLlonglong#define

_pkm_·2020-08-25 04:07

CF 280A. Vanya and Cubes(div2)

http://codeforces.com/contest/492/problem/AVanyagotncubes.Hedecidedtobuildapyramidfromthem.Vanyawantstobuildthepyramidasfollows

bupt_xycr·2020-08-25 04:06

CodeForces 321 A - Ciel and Robot

【题目链接】：clickhere~~【题目大意】：一个robot机器人，可以根据给定的指令行动，给你四种指令，robot初始位置是（0,0），指令一出，robot会重复行动，判断能否在无限行动的情况下经过点（n，m）。【解题思路】其实仔细模拟一下，可以发现是有周期的，判断即可，见代码吧~~代码：#include#include#includeusingnamespacestd;constintN=

herongweiV·2020-08-25 04:06

Codeforces Round #221 (Div. 2) D. Maximum Submatrix 2 (思维题)

题目地址：codeforces221D这场是人生中做的第一场CF中的D题。（当时只做出来了A题。。）过年之际回顾了一下，就顺便看了几道D题。现在做CF的D题在比赛时还是做不出来。

Aerolite坠落·2020-08-25 04:34

codeforces 852A

原题链接：http://codeforces.com/problemset/problem/852/A大致题意：给出一个数字，一种操作：在数位之间插入加号进行加法运算得到的结果作为新的数字。

蒟蒻111·2020-08-25 04:28

ACM-Codeforces Round #280 (Div. 2)

A.VanyaandCubes题意：有n个方块，要将他们堆起来，第一层要1个方块，第二层要1+2个方块，第三层要1+2+3个方块，等等，也就是第i层要1+...+i个方块，问n个方块最多能堆几层。分析：其实每一层需要的方块就是一个等差数列的前i项和，既然这样我们就可以算出每一层需要的方块数，上限也就是1000层，打好表之后，累加层数即可。源代码：#includeintdata[1005];intm

潜水的疯·2020-08-25 04:50

Codeforces373B_Making Sequences is Fun_枚举长度。。。

B.MakingSequencesisFuntimelimitpertest2secondsmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputWe'lldefineS(n)forpositiveintegernasfollows:thenumberofthen'sdigitsinthedecimalbase.Fo

CS_ChenLI·2020-08-25 04:18

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